The sale of art being held by De Veres at Dublin's RHA Gallagher Gallery later this month is not only more substantial than usual, but also includes a wider range of artists than has previously been the case.

There is, for example, a small group of important works by international modern masters which has come from a Dublin private collection. Among the these is lot 347 called Etudes de Campagne, a delightful page of pen and ink studies by the Impressionist Camille Pissarro valued at £6,000-£9,000 and lot 349, an amusing sequence of pencil caricatures by Henri de Toulouse-Lautrec, expected to make £3,000-£5,000.

Lot 348 is a charcoal portrait on paper by Fernand Leger (£5,000-£7,000) and lot 350 a work by Joseph Beuys called How the Dictatorship of the Parties can be Overcome (£4,000-£6,000). However, the highlight of this particular group is lot 346, a pen and ink drawing by Picasso. A relatively late work - it dates from the mid-1950s when the artist was more than 70 years old - the drawing shows a knight and page before a mediaeval townscape and might almost be an illustration for Cervantes' Don Quixote; understandably, it carries an estimate of £35,000-£45,000.

In the De Veres catalogue, this particular group of lots is briefly introduced by art critic Dorothy Walker, who welcomes such an opportunity to see international art being offered for sale in Dublin. In the same auction, Ms Walker is disposing of a number of pictures from her own collection, most notably six works by Louis Le Brocquy.

Lot 304 is especially fascinating, an oil on canvas self-portrait dating from the early 1970s in the manner of the artist's series of head studies which have proven so enduringly appreciated. It is valued at £25,000-£35,000, as is lot 306, a Study for Reconstructed Head of James Joyce painted in the same period as the self-portrait and widely exhibited since.

Both these pictures were purchased by Dorothy Walker directly from Le Brocquy, and so too was lot 305, one of his somewhat later studies of pigeons - this one wounded - and once more expected to fetch £25,000-£35,000. There are also two fine Le Brocquy landscape watercolours dating from 1988 and 1990 (lots 308 and 307) and valued at £3,000-£5,000 and £4,000-£6,000 respectively, and lot 310, a lithograph by Le Brocquy called Study Towards an Image of W B Yeats (£1,000-£2,000).

Other lots from the Walker collection include number 311, a teak and metal sculpture called Hawk by Oisin Kelly (£4,000-£6,000), Robert Ballagh's jesting oils The Atomic Theory (lot 313, £1,000-£1,500) and Figure with an Ellsworth Kelly (lot 314, £1,000-£1,500) and a fine Cecil King canvas, lot 316 Berlin Painting dating from 1970 (£3,000-£4,000). Naturally, there are many other familiar Irish names from Irish art during the past century in this auction, such as Jack Yeats (lot 317, The Flash Captain, £50,000-£70,000) and Gerald Dillon (lot 340, a tapestry called Hands Across the Border, £10,000-£15,000, also lot 390, an oil called Past in the Present, £20,000-£30,000).

In fact, there are few of the better-known artists in this country during the past 100 years who do not feature in the De Veres sale which takes place on Tuesday, 21st November in two sessions starting at 12.30 p.m. and 6 p.m.

The company has now established its own facility for clients to view, bid and purchase lots via the Internet, and the forthcoming live auction will therefore be held simultaneously with that online.